RHEL 5 or 6 cluster node "lost contact with quorum device"

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Issue

A cluster node loses quorum after rebooting, removing, or fencing another node from the cluster

Quorum disk lost connectivity and caused a node reboot. What should the cman setting quorum_dev_poll be set to?

My cluster lost contact with the quorum device and cluster nodes Rebooted:

openais[11663]: [CMAN ] lost contact with quorum device
openais[11664]: [CMAN ] cman killed by node 1 because we were killed by cman_tool or other application

After disconnecting one path in a multipath map for the quorum device, the node loses quorum after "lost contact with quorum device" and the cluster services stop rather than continuing to run or relocating to another node, as expected.